Date archives: 18 August 2010

Track 159 is the one of the problem tracks.  Very crude analysis in Excel shows wildly varying bit cells.  Very hard to say at this point if it's the problem as I have not compared them against the rest of the disk.  The problem is related to an earlier post...

Last night I scanned about 6 disks in and tinkered with the MFM decoding logic.  Most of my time was spent with genuine faulty disks, for half of the night I got that dreaded click-click-click-click sound as the head passed over a tiny piece of dirt.  Out came the cotton...